Implement a ScopedThreadHeapUsage class to allow profiling per-thread heap usage.

base/allocator/winheap_stubs_win.h

 // Copyright 2016 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 // Thin allocation wrappers for the windows heap. This file should be deleted
 // once the win-specific allocation shim has been removed, and the generic shim
 // has becaome the default.
 
 #ifndef BASE_ALLOCATOR_WINHEAP_STUBS_H_
 #define BASE_ALLOCATOR_WINHEAP_STUBS_H_
 
 #include <stdint.h>
 
 namespace base {
 namespace allocator {
 
 // Set to true if the link-time magic has successfully hooked into the CRT's
 // heap initialization.
 extern bool g_is_win_shim_layer_initialized;
 
 // Thin wrappers to implement the standard C allocation semantics on the
 // CRT's Windows heap.
 void* WinHeapMalloc(size_t size);
-void WinHeapFree(void* size);
+void WinHeapFree(void* ptr);
 void* WinHeapRealloc(void* ptr, size_t size);
 
+// Returns a lower-bound estimate for the full amount of memory consumed by the
+// the allocation |ptr|.
+size_t WinHeapGetSizeEstimate(void* ptr);
+
 // Call the new handler, if one has been set.
 // Returns true on successfully calling the handler, false otherwise.
 bool WinCallNewHandler(size_t size);
 
 }  // namespace allocator
 }  // namespace base
 
 #endif  // BASE_ALLOCATOR_WINHEAP_STUBS_H_